WebP image support - Product Import Export for WooCommerce (https://www.webtoffee.com/product/product-import-export-woocommerce/)

functions.php

<?php //do not copy this line
function wt_mime_types($mime_types) {
    $mime_types['webp'] = 'image/webp'; //Adding webp extension
    return $mime_types;
}
add_filter('woocommerce_rest_allowed_image_mime_types', 'wt_mime_types', 1, 1);